Apparatus, system and method of communicating a wakeup packet

ABSTRACT

Some demonstrative embodiments include apparatuses, devices, systems and methods of a wakeup packet response. For example, an apparatus may include circuitry configured to cause a first wireless device to transmit a frame comprising mapping information to map a plurality of Modulation and Coding Schemes (MCS) to a respective plurality of preamble lengths; generate a wakeup packet comprising a preamble having a preamble length of the plurality of preamble lengths corresponding to an MCS of a non-wakeup transmission from the first wireless device; and transmit the wakeup packet to a second wireless device.

TECHNICAL FIELD

Embodiments described herein generally relate to communicating a wakeuppacket.

BACKGROUND

Some computing devices, for example, small computing devices, such as,for example, wearable devices and/or sensors, are constrained by a smallbattery capacity.

However, such devices may be required to support wireless communicationtechnologies such as, for example, Wi-Fi, and/or Bluetooth (BT), forexample, to connect to other computing devices, e.g., a Smartphone, forexample, to exchange data.

Exchanging data using the wireless communication technologies mayconsume power of the battery, and it may be beneficial, or evencritical, to minimize energy consumption of one or more communicationblocks in such computing devices

BRIEF DESCRIPTION OF THE DRAWINGS

For simplicity and clarity of illustration, elements shown in thefigures have not necessarily been drawn to scale. For example, thedimensions of some of the elements may be exaggerated relative to otherelements for clarity of presentation. Furthermore, reference numeralsmay be repeated among the figures to indicate corresponding or analogouselements. The figures are listed below.

FIG. 1 is a schematic block diagram illustration of a system, inaccordance with some demonstrative embodiments.

FIG. 2 is a schematic illustration of wakeup packet structure, inaccordance with some demonstrative embodiments.

FIG. 3 is a schematic illustration of a wakeup packet transmission, inaccordance with some demonstrative embodiments.

FIG. 4 is a schematic illustration of two transmission schemes, inaccordance with some demonstrative embodiments.

FIG. 5 is a schematic flow-chart illustration of a method ofcommunicating a wakeup packet, in accordance with some demonstrativeembodiments.

FIG. 6 is a schematic illustration of a product of manufacture, inaccordance with some demonstrative embodiments.

DETAILED DESCRIPTION

In the following detailed description, numerous specific details are setforth in order to provide a thorough understanding of some embodiments.However, it will be understood by persons of ordinary skill in the artthat some embodiments may be practiced without these specific details.In other instances, well-known methods, procedures, components, unitsand/or circuits have not been described in detail so as not to obscurethe discussion.

Discussions herein utilizing terms such as, for example, “processing”,“computing”, “calculating”, “determining”, “establishing”, “analyzing”,“checking”, or the like, may refer to operation(s) and/or process(es) ofa computer, a computing platform, a computing system, or otherelectronic computing device, that manipulate and/or transform datarepresented as physical (e.g., electronic) quantities within thecomputer's registers and/or memories into other data similarlyrepresented as physical quantities within the computer's registersand/or memories or other information storage medium that may storeinstructions to perform operations and/or processes.

The terms “plurality” and “a plurality”, as used herein, include, forexample, “multiple” or “two or more”. For example, “a plurality ofitems” includes two or more items.

References to “one embodiment”, “an embodiment”, “demonstrativeembodiment”, “various embodiments” etc., indicate that the embodiment(s)so described may include a particular feature, structure, orcharacteristic, but not every embodiment necessarily includes theparticular feature, structure, or characteristic. Further, repeated useof the phrase “in one embodiment” does not necessarily refer to the sameembodiment, although it may.

As used herein, unless otherwise specified the use of the ordinaladjectives “first”, “second”, “third” etc., to describe a common object,merely indicate that different instances of like objects are beingreferred to, and are not intended to imply that the objects so describedmust be in a given sequence, either temporally, spatially, in ranking,or in any other manner.

Some embodiments may be used in conjunction with various devices andsystems, for example, a User Equipment (UE), a Mobile Device (MD), awireless station (STA), a Personal Computer (PC), a desktop computer, amobile computer, a laptop computer, a notebook computer, a tabletcomputer, a server computer, a handheld computer, a handheld device, anInternet of Things (IoT) device, a sensor device, a wearable device, aPersonal Digital Assistant (PDA) device, a handheld PDA device, anon-board device, an off-board device, a hybrid device, a vehiculardevice, a non-vehicular device, a mobile or portable device, a consumerdevice, a non-mobile or non-portable device, a wireless communicationstation, a wireless communication device, a wireless Access Point (AP),a wired or wireless router, a wired or wireless modem, a video device,an audio device, an audio-video (A/V) device, a wired or wirelessnetwork, a wireless area network, a Wireless Video Area Network (WVAN),a Local Area Network (LAN), a Wireless LAN (WLAN), a Personal AreaNetwork (PAN), a Wireless PAN (WPAN), and the like.

Some embodiments may be used in conjunction with devices and/or networksoperating in accordance with existing IEEE 802.11 standards (includingIEEE 802.11-2012 (IEEE 802.11-2012, IEEE Standard for Informationtechnology—Telecommunications and information exchange between systemsLocal and metropolitan area networks—Specific requirements Part 11:Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)Specifications, Mar. 29, 2012); IEEE802.11ac-2013 (“IEEE P802.11ac-2013,IEEE Standard for Information Technology—Telecommunications andInformation Exchange Between Systems—Local and Metropolitan AreaNetworks—Specific Requirements—Part 11: Wireless LAN Medium AccessControl (MAC) and Physical Layer (PHY) Specifications—Amendment 4:Enhancements for Very High Throughput for Operation in Bands below 6GHz”, December, 2013); IEEE 802.11ad (“IEEE P802.11ad-2012, IEEEStandard for Information Technology—Telecommunications and InformationExchange Between Systems—Local and Metropolitan Area Networks—SpecificRequirements—Part 11: Wireless LAN Medium Access Control (MAC) andPhysical Layer (PHY) Specifications—Amendment 3: Enhancements for VeryHigh Throughput in the 60 GHz Band”, 28 Dec. 2012); IEEE-802.11REVmc(“IEEE 802.11-REVmc™/D3.0, June 2014 draft standard for Informationtechnology—Telecommunications and information exchange between systemsLocal and metropolitan area networks Specific requirements; Part 11:Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)Specification”); IEEE 802.11ax (IEEE 802.11ax, High Efficiency WLAN(HEW)); IEEE802.11-ay (P802.11ay Standard for InformationTechnology—Telecommunications and Information Exchange Between SystemsLocal and Metropolitan Area Networks—Specific Requirements Part 11:Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY)Specifications—Amendment: Enhanced Throughput for Operation inLicense—Exempt Bands Above 45 GHz)) and/or future versions and/orderivatives thereof) and/or future versions and/or derivatives thereof,devices and/or networks operating in accordance with existingWireless-Gigabit-Alliance (WGA) specifications (Wireless GigabitAlliance, Inc WiGig MAC and PHY Specification Version 1.1, April 2011,Final specification) and/or future versions and/or derivatives thereof,devices and/or networks operating in accordance with existing WirelessFidelity (WiFi) Alliance (WFA) Peer-to-Peer (P2P) specifications (WiFiP2P technical specification, version 1.5, Aug. 4, 2014) and/or futureversions and/or derivatives thereof, devices and/or networks operatingin accordance with existing cellular specifications and/or protocols,e.g., 3rd Generation Partnership Project (3GPP), 3GPP Long TermEvolution (LTE) and/or future versions and/or derivatives thereof,devices and/or networks operating in accordance with existing Bluetooth(BT) specifications and/or protocols and/or future versions and/orderivatives thereof, units and/or devices which are part of the abovenetworks, and the like.

Some embodiments may be used in conjunction with one way and/or two-wayradio communication systems, cellular radio-telephone communicationsystems, a mobile phone, a cellular telephone, a wireless telephone, aPersonal Communication Systems (PCS) device, a PDA device whichincorporates a wireless communication device, a mobile or portableGlobal Positioning System (GPS) device, a device which incorporates aGPS receiver or transceiver or chip, a device which incorporates an RFIDelement or chip, a Multiple Input Multiple Output (MIMO) transceiver ordevice, a Single Input Multiple Output (SIMO) transceiver or device, aMultiple Input Single Output (MISO) transceiver or device, a devicehaving one or more internal antennas and/or external antennas, DigitalVideo Broadcast (DVB) devices or systems, multi-standard radio devicesor systems, a wired or wireless handheld device, e.g., a Smartphone, aWireless Application Protocol (WAP) device, or the like.

Some embodiments may be used in conjunction with one or more types ofwireless communication signals and/or systems, for example, RadioFrequency (RF), Infra Red (IR), Frequency-Division Multiplexing (FDM),Orthogonal FDM (OFDM), Orthogonal Frequency-Division Multiple Access(OFDMA), FDM Time-Division Multiplexing (TDM), Time-Division MultipleAccess (TDMA), Multi-User MIMO (MU-MIMO), Spatial Division MultipleAccess (SDMA), Extended TDMA (E-TDMA), General Packet Radio Service(GPRS), extended GPRS, Code-Division Multiple Access (CDMA), WidebandCDMA (WCDMA), CDMA 2000, single-carrier CDMA, multi-carrier CDMA,Multi-Carrier Modulation (MDM), Discrete Multi-Tone (DMT), Bluetooth®,Global Positioning System (GPS), Wi-Fi, Wi-Max, ZigBee™, Ultra-Wideband(UWB), Global System for Mobile communication (GSM), 2G, 2.5G, 3G, 3.5G,4G, Fifth Generation (5G), or Sixth Generation (6G) mobile networks,3GPP, Long Term Evolution (LTE), LTE advanced, Enhanced Data rates forGSM Evolution (EDGE), or the like. Other embodiments may be used invarious other devices, systems and/or networks.

The term “wireless device”, as used herein, includes, for example, adevice capable of wireless communication, a communication device capableof wireless communication, a communication station capable of wirelesscommunication, a portable or non-portable device capable of wirelesscommunication, or the like. In some demonstrative embodiments, awireless device may be or may include a peripheral that is integratedwith a computer, or a peripheral that is attached to a computer. In somedemonstrative embodiments, the term “wireless device” may optionallyinclude a wireless service.

The term “communicating” as used herein with respect to a communicationsignal includes transmitting the communication signal and/or receivingthe communication signal. For example, a communication unit, which iscapable of communicating a communication signal, may include atransmitter to transmit the communication signal to at least one othercommunication unit, and/or a communication receiver to receive thecommunication signal from at least one other communication unit. Theverb communicating may be used to refer to the action of transmitting orthe action of receiving. In one example, the phrase “communicating asignal” may refer to the action of transmitting the signal by a firstdevice, and may not necessarily include the action of receiving thesignal by a second device. In another example, the phrase “communicatinga signal” may refer to the action of receiving the signal by a firstdevice, and may not necessarily include the action of transmitting thesignal by a second device.

As used herein, the term “circuitry” may refer to, be part of, orinclude, an Application Specific Integrated Circuit (ASIC), anintegrated circuit, an electronic circuit, a processor (shared,dedicated, or group), and/or memory (shared, dedicated, or group), thatexecute one or more software or firmware programs, a combinational logiccircuit, and/or other suitable hardware components that provide thedescribed functionality. In some embodiments, the circuitry may beimplemented in, or functions associated with the circuitry may beimplemented by, one or more software or firmware modules. In someembodiments, circuitry may include logic, at least partially operable inhardware.

Some demonstrative embodiments may be used in conjunction with a WLAN,e.g., a WiFi network. Other embodiments may be used in conjunction withany other suitable wireless communication network, for example, awireless area network, a “piconet”, a WPAN, a WVAN and the like.

The term “antenna”, as used herein, may include any suitableconfiguration, structure and/or arrangement of one or more antennaelements, components, units, assemblies and/or arrays. In someembodiments, the antenna may implement transmit and receivefunctionalities using separate transmit and receive antenna elements. Insome embodiments, the antenna may implement transmit and receivefunctionalities using common and/or integrated transmit/receiveelements. The antenna may include, for example, a phased array antenna,a single element antenna, a set of switched beam antennas, and/or thelike.

Reference is made to FIG. 1, which schematically illustrates a system100, in accordance with some demonstrative embodiments.

As shown in FIG. 1, in some demonstrative embodiments, system 100 mayinclude one or more wireless communication devices. For example, system100 may include a first wireless communication device 102, and/or asecond wireless communication device 140.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude a mobile device or a non-mobile, e.g., a static, device. Forexample, device 102 and/or device 140 may include, for example, a UE, anMD, a STA, an AP, a PC, a desktop computer, a mobile computer, a laptopcomputer, an Ultrabook™ computer, a notebook computer, a tabletcomputer, a server computer, a handheld computer, an Internet of Things(IoT) device, a sensor device, a wearable device, a BT device, ahandheld device, a PDA device, a handheld PDA device, an on-boarddevice, an off-board device, a hybrid device (e.g., combining cellularphone functionalities with PDA device functionalities), a consumerdevice, a vehicular device, a non-vehicular device, a mobile or portabledevice, a non-mobile or non-portable device, a mobile phone, a cellulartelephone, a PCS device, a PDA device which incorporates a wirelesscommunication device, a mobile or portable GPS device, a DVB device, arelatively small computing device, a non-desktop computer, a “CarrySmall Live Large” (CSLL) device, an Ultra Mobile Device (UMD), an UltraMobile PC (UMPC), a Mobile Internet Device (MID), an “Origami” device orcomputing device, a device that supports Dynamically ComposableComputing (DCC), a context-aware device, a video device, an audiodevice, an A/V device, a Set-Top-Box (STB), a Blu-ray disc (BD) player,a BD recorder, a Digital Video Disc (DVD) player, a High Definition (HD)DVD player, a DVD recorder, a HD DVD recorder, a Personal Video Recorder(PVR), a broadcast HD receiver, a video source, an audio source, a videosink, an audio sink, a stereo tuner, a broadcast radio receiver, a flatpanel display, a Personal Media Player (PMP), a digital video camera(DVC), a digital audio player, a speaker, an audio receiver, an audioamplifier, a gaming device, a data source, a data sink, a Digital Stillcamera (DSC), a media player, a Smartphone, a television, a musicplayer, or the like.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or moreSTAs. For example, device 102 may include at least one STA, and/ordevice 140 may include at least one STA.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or moreWLAN STAs.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or moreWi-Fi STAs.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or more BTdevices.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or moreNeighbor Awareness Networking (NAN) STAs.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of one or morelocation measurement STAs.

In one example, a station (STA) may include a logical entity that is asingly addressable instance of a medium access control (MAC) andphysical layer (PHY) interface to the wireless medium (WM). The STA mayperform any other additional or alternative functionality.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude, operate as, and/or perform the functionality of any otherdevices and/or STAs.

In some demonstrative embodiments, devices 102 and/or 140 may beconfigured to operate as, and/or to perform the functionality of, anaccess point (AP), and/or a personal basic service set (PBSS) controlpoint (PCP), for example, an AP/PCP STA.

In some demonstrative embodiments, devices 102 and/or 140 may beconfigured to operate as, and/or to perform the functionality of, anon-AP STA, and/or a non-PCP STA, for example, a non-AP/PCP STA.

In one example, an AP may include an entity that contains a station(STA), e.g., one STA, and provides access to distribution services, viathe wireless medium (WM) for associated STAs. The AP may perform anyother additional or alternative functionality.

In one example, a personal basic service set (PBSS) control point (PCP)may include an entity that contains a STA, e.g., one station (STA), andcoordinates access to the wireless medium (WM) by STAs that are membersof a PBSS. The PCP may perform any other additional or alternativefunctionality.

In one example, a PBSS may include a directional multi-gigabit (DMG)basic service set (BSS) that includes, for example, one PBSS controlpoint (PCP). For example, access to a distribution system (DS) may notbe present, but, for example, an intra-PBSS forwarding service mayoptionally be present.

In one example, a PCP/AP STA may include a station (STA) that is atleast one of a PCP or an AP. The PCP/AP STA may perform any otheradditional or alternative functionality.

In one example, a non-AP STA may include a STA that is not containedwithin an AP. The non-AP STA may perform any other additional oralternative functionality.

In one example, a non-PCP STA may include a STA that is not a PCP. Thenon-PCP STA may perform any other additional or alternativefunctionality.

In one example, a non PCP/AP STA may include a STA that is not a PCP andthat is not an AP. The non-PCP/AP STA may perform any other additionalor alternative functionality.

In one example, device 102 may be configured to operate as, and/or toperform the functionality of the AP, and/or device 140 may be configuredto operate as, and/or to perform the functionality of a non-PCP/AP STA.

In some demonstrative embodiments, device 102 may include, for example,one or more of a processor 191, an input unit 192, an output unit 193, amemory unit 194, and/or a storage unit 195; and/or device 140 mayinclude, for example, one or more of a processor 181, an input unit 182,an output unit 183, a memory unit 184, and/or a storage unit 185. Device102 and/or device 140 may optionally include other suitable additionalor alternative hardware components and/or software components. In somedemonstrative embodiments, some or all of the components of one or moreof device 102 and/or device 140 may be enclosed in a common housing orpackaging, and may be interconnected or operably associated using one ormore wired or wireless links. In other embodiments, components of one ormore of device 102 and/or device 140 may be distributed among multipleor separate devices.

In some demonstrative embodiments, processor 191 and/or processor 181may include, for example, a Central Processing Unit (CPU), a DigitalSignal Processor (DSP), one or more processor cores, a single-coreprocessor, a dual-core processor, a multiple-core processor, amicroprocessor, a host processor, a controller, a plurality ofprocessors or controllers, a chip, a microchip, one or more circuits,circuitry, a logic unit, an Integrated Circuit (IC), anApplication-Specific IC (ASIC), or any other suitable multi-purpose orspecific processor or controller. Processor 191 executes instructions,for example, of an Operating System (OS) of device 102 and/or of one ormore suitable applications. Processor 181 executes instructions, forexample, of an Operating System (OS) of device 140 and/or of one or moresuitable applications.

In some demonstrative embodiments, input unit 192 and/or input unit 182may include, for example, a keyboard, a keypad, a mouse, a touch-screen,a touch-pad, a track-ball, a stylus, a microphone, or other suitablepointing device or input device. Output unit 193 and/or output unit 183may include, for example, a monitor, a screen, a touch-screen, a flatpanel display, a Light Emitting Diode (LED) display unit, a LiquidCrystal Display (LCD) display unit, a plasma display unit, one or moreaudio speakers or earphones, or other suitable output devices.

In some demonstrative embodiments, memory unit 194 and/or memory unit184 may include, for example, a Random Access Memory (RAM), a Read OnlyMemory (ROM), a Dynamic RAM (DRAM), a Synchronous DRAM (SD-RAM), a flashmemory, a volatile memory, a non-volatile memory, a cache memory, abuffer, a short term memory unit, a long term memory unit, or othersuitable memory units. Storage unit 195 and/or storage unit 185 mayinclude, for example, a hard disk drive, a floppy disk drive, a CompactDisk (CD) drive, a CD-ROM drive, a DVD drive, or other suitableremovable or non-removable storage units. Memory unit 194 and/or storageunit 195, for example, may store data processed by device 102. Memoryunit 184 and/or storage unit 185, for example, may store data processedby device 140.

In some demonstrative embodiments, wireless communication device 102and/or device 140 may be capable of communicating content, data,information and/or signals via a wireless medium (WM) 103. In somedemonstrative embodiments, wireless medium 103 may include, for example,a radio channel, a cellular channel, an RF channel, a WiFi channel, anIR channel, a Bluetooth (BT) channel, a Global Navigation SatelliteSystem (GNSS) Channel, and the like.

In some demonstrative embodiments, WM 103 may include a channel over a2.4 Gigahertz (GHz) frequency band, a channel over a 5 GHz frequencyband, a channel over a millimeterWave (mmWave) frequency band, e.g., a60 GHz frequency band, a channel over a sub 1 Gigahertz (S1G) frequencyband, and/or any other channel over any other band.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude one or more radios including circuitry and/or logic to performwireless communication between devices 102, 140 and/or one or more otherwireless communication devices. For example, device 102 may include atleast one radio 114, and/or device 140 may include at least one radio144.

In some demonstrative embodiments, radios 114 and/or 144 may include oneor more wireless receivers (Rx) including circuitry and/or logic toreceive wireless communication signals, RF signals, frames, blocks,transmission streams, packets, messages, data items, and/or data. Forexample, radio 114 may include at least one receiver 116, and/or radio144 may include at lest one receiver 146.

In some demonstrative embodiments, radios 114 and/or 144 may include oneor more wireless transmitters (Tx) including circuitry and/or logic totransmit wireless communication signals, RF signals, frames, blocks,transmission streams, packets, messages, data items, and/or data. Forexample, radio 114 may include at least one transmitter 118, and/orradio 144 may include at least one transmitter 148.

In some demonstrative embodiments, radio 114, radio 144, transmitter118, transmitter 148, receiver 116, and/or receiver 148 may includecircuitry; logic; Radio Frequency (RF) elements, circuitry and/or logic;baseband elements, circuitry and/or logic; modulation elements,circuitry and/or logic; demodulation elements, circuitry and/or logic;amplifiers; analog to digital and/or digital to analog converters;filters; and/or the like. For example, radios 114 and/or 144 may includeor may be implemented as part of a wireless Network Interface Card(NIC), and the like.

In some demonstrative embodiments, radios 114 and/or 144 may include, ormay be associated with, one or more antennas 107 and/or 147,respectively.

In one example, device 102 may include a single antenna 107. In anotherexample, device 102 may include two or more antennas 107.

In one example, device 140 may include a single antenna 147. In anotherexample, device 140 may include two or more antennas 147.

Antennas 107 and/or 147 may include any type of antennas suitable fortransmitting and/or receiving wireless communication signals, blocks,frames, transmission streams, packets, messages and/or data. Forexample, antennas 107 and/or 147 may include any suitable configuration,structure and/or arrangement of one or more antenna elements,components, units, assemblies and/or arrays. Antennas 107 and/or 147 mayinclude, for example, antennas suitable for directional communication,e.g., using beamforming techniques. For example, antennas 107 and/or 147may include a phased array antenna, a multiple element antenna, a set ofswitched beam antennas, and/or the like. In some embodiments, antennas107 and/or 147 may implement transmit and receive functionalities usingseparate transmit and receive antenna elements. In some embodiments,antennas 107 and/or 147 may implement transmit and receivefunctionalities using common and/or integrated transmit/receiveelements.

In some demonstrative embodiments, device 102 may include a controller124, and/or device 140 may include a controller 154. Controllers 124and/or 154 may be configured to perform one or more communications, maygenerate and/or communicate one or more messages and/or transmissions,and/or may perform one or more functionalities, operations and/orprocedures between devices 102, and/or 140 and/or one or more otherdevices, e.g., as described below.

In some demonstrative embodiments, controllers 124 and/or 154 mayinclude circuitry and/or logic, e.g., one or more processors includingcircuitry and/or logic, memory circuitry and/or logic, Media-AccessControl (MAC) circuitry and/or logic, Physical Layer (PHY) circuitryand/or logic, and/or any other circuitry and/or logic, configured toperform the functionality of controllers 124 and/or 154, respectively.Additionally or alternatively, one or more functionalities ofcontrollers 124 and/or 154 may be implemented by logic, which may beexecuted by a machine and/or one or more processors, e.g., as describedbelow.

In one example, controller 124 may include circuitry and/or logic, forexample, one or more processors including circuitry and/or logic, tocause, trigger and/or control a wireless device, e.g., device 102,and/or a wireless station, e.g., a wireless STA implemented by device102, to perform one or more operations, communications and/orfunctionalities, e.g., as described herein.

In one example, controller 154 may include circuitry and/or logic, forexample, one or more processors including circuitry and/or logic, tocause, trigger and/or control a wireless device, e.g., device 140,and/or a wireless station, e.g., a wireless STA implemented by device140, to perform one or more operations, communications and/orfunctionalities, e.g., as described herein.

In some demonstrative embodiments, device 102 may include a messageprocessor 128 configured to generate, process and/or access one ormessages communicated by device 102.

In one example, message processor 128 may be configured to generate oneor more messages to be transmitted by device 102, and/or messageprocessor 128 may be configured to access and/or to process one or moremessages received by device 102, e.g., as described below.

In some demonstrative embodiments, device 140 may include a messageprocessor 158 configured to generate, process and/or access one ormessages communicated by device 140.

In one example, message processor 158 may be configured to generate oneor more messages to be transmitted by device 140, and/or messageprocessor 158 may be configured to access and/or to process one or moremessages received by device 140, e.g., as described below.

In some demonstrative embodiments, message processors 128 and/or 158 mayinclude circuitry and/or logic, e.g., one or more processors includingcircuitry and/or logic, memory circuitry and/or logic, Media-AccessControl (MAC) circuitry and/or logic, Physical Layer (PHY) circuitryand/or logic, and/or any other circuitry and/or logic, configured toperform the functionality of message processors 128 and/or 158,respectively. Additionally or alternatively, one or more functionalitiesof message processors 128 and/or 158 may be implemented by logic, whichmay be executed by a machine and/or one or more processors, e.g., asdescribed below.

In some demonstrative embodiments, at least part of the functionality ofmessage processor 128 may be implemented as part of radio 114, and/or atleast part of the functionality of message processor 158 may beimplemented as part of radio 144.

In some demonstrative embodiments, at least part of the functionality ofmessage processor 128 may be implemented as part of controller 124,and/or at least part of the functionality of message processor 158 maybe implemented as part of controller 154.

In other embodiments, the functionality of message processor 128 may beimplemented as part of any other element of device 102, and/or thefunctionality of message processor 158 may be implemented as part of anyother element of device 140.

In some demonstrative embodiments, at least part of the functionality ofcontroller 124 and/or message processor 128 may be implemented by anintegrated circuit, for example, a chip, e.g., a System on Chip (SoC).In one example, the chip or SoC may be configured to perform one or morefunctionalities of radio 114. For example, the chip or SoC may includeone or more elements of controller 124, one or more elements of messageprocessor 128, and/or one or more elements of radio 114. In one example,controller 124, message processor 128, and radio 114 may be implementedas part of the chip or SoC.

In other embodiments, controller 124, message processor 128 and/or radio114 may be implemented by one or more additional or alternative elementsof device 102.

In some demonstrative embodiments, device 102 and/or device 140 mayinclude a wearable device, a sensor, small device, a mobile device,and/or any other device, which may be, for example, powered by a batteryand/or any other power source having a limited capacity.

In some demonstrative embodiments, device 102 and/or device 140 maysupport wireless communication technologies such as, for example, Wi-Fi,Bluetooth (BT), and/or any other additional or alternative technology,for example, to connect between device 102, device 140, and/or otherwireless devices.

In some demonstrative embodiments, device 140 may include a wearabledevice and/or a sensor device powered by a power source having a limitedcapacity, e.g., a small battery.

In some demonstrative embodiments, device 140 may be configured tocommunicate data with another device, e.g., device 102, which may beless power constrained than device 140, for example, a Smartphone.

In some demonstrative embodiments, communicating data between device 102and device 140 may consume power of the power source of device 140.

In some demonstrative embodiments, minimizing energy consumption of oneor more communication blocks, modules and/or elements of device 140 maybe beneficial, and in some cases, even critical, for example, in orderto reduce and/or minimize power consumption of the power source ofdevice 140.

In some demonstrative embodiments, power consumption of device 140 maybe reduced, e.g., minimized, for example, by powering off one or morecommunication blocks, modules and/or elements of device 140, e.g., asmuch as possible, for example, while maintaining data transmissionand/or reception capabilities of device 140, e.g., without substantiallyincreasing latency and/or degrading quality of data communication.

In one example, one or more communication blocks, modules and/orelements of device 140 may be powered on and/or may be woken up, forexample, only when there is data to transmit, and/or only when there isdata to receive. According to this example, the one or morecommunication blocks, modules and/or elements of device 140 may bepowered off and/or switched to a sleep mode, for example, for the restof the time.

For example, one or more elements of radio 144 may be powered on and/ormay be woken up, for example, only when device 140 has data to transmit,and/or only when device 140 has data to receive. According to thisexample, one or more elements of radio 144 may be powered off and/orswitched to the sleep mode, for example, for the rest of the time.

In some demonstrative embodiments, device 140 may include a wakeupreceiver 150 configured to power on and/or to wakeup radio 144 of device140.

In some demonstrative embodiments, wakeup receiver 150 may wakeup radio144, for example, based on a packet, e.g., a wakeup packet, receivedfrom another device, e.g., device 102, which is, for example, totransmit data to device 140.

In some demonstrative embodiments, wakeup receiver 150 may include areceiver 156 configured to receive the wakeup packet.

In some demonstrative embodiments, wakeup receiver 150 may includecircuitry and/or logic configured to receive, decode, demodulate, and/orprocess the wakeup packet.

In some demonstrative embodiments, receiver 156 may include circuitry;logic; Radio Frequency (RF) elements, circuitry and/or logic; basebandelements, circuitry and/or logic; demodulation elements, circuitryand/or logic; amplifiers; analog to digital converters; filters; and/orthe like.

In some demonstrative embodiments, wakeup receiver 150 may include acontroller 159 configured to control one or more operations and/orfunctionalities of wakeup receiver 150, e.g., for processing the wakeuppacket and/or waking up radio 144. For example, controller 159 may beconfigured to control a power supply of radio 144, and/or any othermechanism to wakeup radio 144, e.g., upon determining that a wakeuppacket has been received by wakeup receiver 150.

In some demonstrative embodiments, controller 159 may be configured toperform one or more communications, to generate and/or communicate oneor more messages and/or transmissions, and/or to perform one or morefunctionalities, operations and/or procedures, e.g., as described below.

In some demonstrative embodiments, controller 159 may include circuitryand/or logic, e.g., one or more processors including circuitry and/orlogic, memory circuitry and/or logic, Media-Access Control (MAC)circuitry and/or logic, Physical Layer (PHY) circuitry and/or logic,and/or any other circuitry and/or logic, configured to perform thefunctionality of controller 159. Additionally or alternatively, one ormore functionalities of controller 159 may be implemented by logic,which may be executed by a machine and/or one or more processors, e.g.,as described below.

In one example, controller 159 may include circuitry and/or logic, forexample, one or more processors including circuitry and/or logic, tocause a wireless device, e.g., device 140, and/or a wireless station,e.g., a wireless STA implemented by device 140, to perform one or moreoperations, communications and/or functionalities, e.g., as describedherein.

In some demonstrative embodiments, wakeup receiver 150 may include amessage processor 157 configured to process and/or access one ormessages communicated by wakeup receiver 150.

In some demonstrative embodiments, message processor 157 may beconfigured to process one or more wakeup packets received by wakeupreceiver 150, and/or to indicate to controller 159 that a wakeup packetis received.

In one example, message processor 157 may be configured to access,process, demodulate and/or decode reception of the wakeup packets by awireless station, e.g., a wireless STA implemented by device 140.

In some demonstrative embodiments, message processor 157 may includecircuitry and/or logic, e.g., one or more processors including circuitryand/or logic, memory circuitry and/or logic, Media-Access Control (MAC)circuitry and/or logic, Physical Layer (PHY) circuitry and/or logic,and/or any other circuitry and/or logic, configured to perform thefunctionality of message processor 157. Additionally or alternatively,one or more functionalities of message processor 157 may be implementedby logic, which may be executed by a machine and/or one or moreprocessors, e.g., as described below.

In some demonstrative embodiments, at least part of the functionality ofmessage processor 157 may be implemented as part of message processor158.

In some demonstrative embodiments, at least part of the functionality ofmessage processor 157 may be implemented as part of any other element ofwakeup receiver 150. For example, at least part of the functionality ofmessage processor 157 may be implemented as part of receiver 156 and/orcontroller 159.

In some demonstrative embodiments, at least part of the functionality ofreceiver 156, controller 159 and/or message processor 157 may beimplemented by an integrated circuit, for example, a chip, e.g., aSystem on Chip (SoC). In one example, the chip or SoC may be configuredto perform one or more functionalities of radio 144, controller 154and/or message processor 158. For example, the chip or SoC may includeone or more elements of controller 159, one or more elements of messageprocessor 157, and/or one or more elements of receiver 156, one or moreelements of radio 144, one or more elements of message processor 158,and/or one or more elements of controller 154. In one example, wakeupreceiver 150, message processor 158, controller 154, and/or radio 144may be implemented as part of the chip or SoC.

In other embodiments, radio 144, wakeup receiver 150, controller 154and/or message processor 158 may be implemented by one or moreadditional or alternative elements of device 140.

In some demonstrative embodiments, wakeup receiver 150 may be associatedwith one or more of antennas 147, e.g., which may be shared with radio144.

In other embodiments, wakeup receiver 150 may include, or may beassociated with, another, e.g., separate, antenna.

In some demonstrative embodiments, wakeup receiver 150 may be configuredto wakeup radio 144, for example, if device 140 has data to transmit,and/or if data is to be received by radio 144.

In one example, wakeup receiver 150 may be configured to implement alow-power wakeup receiver (LP-WUR) scheme, for example, to wakeup radio144, e.g., only when device 140 is to receive data and/or to transmitdata.

In some demonstrative embodiments, the LP-WUR scheme, may introduce apower save mode (“LP-WUR mode”), for example, to an IEEE 802.11Specification, e.g., as described below.

In some demonstrative embodiments, a device including an LP-WUR (“LP-WURSTA/Device”) may be configured to enter a mode (“LP-WUR mode”), e.g., inwhich the device is to turn off or power down a radio, e.g., an 802.11radio, and operate the LP-WUR to wait for a wakeup packet.

In one example, device 140 including wakeup receiver 150 may beconfigured to enter the LP-WUR mode, in which the device 140 is to turnoff or power down radio 144 radio and operate wakeup receiver 150 towait for a wakeup packet.

In some demonstrative embodiments, wakeup receiver 150 may have, forexample, a relatively low power consumption, e.g., less than 100microwatts. Accordingly, the power consumption of device 140 may bereduced for example, during times when there is no data to be receivedat device 140 and only wakeup receiver 150 is on.

In some demonstrative embodiments, wakeup receiver 150 may wakeup radio144, for example, based on a wakeup packet received from device 102.

In one example, receiver 156 may be configured to receive the wakeuppacket from device 102, message processor 156 may be configured toprocess the wakeup packet, and/or controller 159 may be configured towakeup radio 144.

In some demonstrative embodiments, device 102 may be configured totransmit the wakeup packet to device 140, for example, to indicate towakeup receiver 150 that the radio 144 is to be woken up, e.g., toreceive data from device 102.

In some demonstrative embodiments, controller 159 may be configured tocause radio 144 to wakeup, e.g., to switch to an active mode, forexample, to receive data from device 102, e.g., subsequent to receivingthe wakeup packet from device 102.

In some demonstrative embodiments, controller 159 may be configured tocause, control and/or trigger radio 144 to wakeup, e.g., to switch to anactive mode, for example, to transmit data to device 102 and/or toanother device.

In some demonstrative embodiments, device 102 and/or device 140 may beconfigured to communicate the wakeup packet, for example, in compliancewith one or more wireless communication standards and/or protocols.

In some demonstrative embodiments, device 102 and/or device 140 may beconfigured to communicate the wakeup packet, for example, in compliancewith one or more existing wireless communication standards and/orprotocols (“legacy standards”), for example, in compliance with one ormore IEEE 802.11 standards.

In some demonstrative embodiments, the wakeup packet may include apreamble in compliance with one or more legacy standards, for example,to enable one or more legacy devices to decode and/or process thepreamble.

In some demonstrative embodiments, the wakeup packet may include apayload, e.g., following the legacy preamble.

In some demonstrative embodiments, the payload may be modulated by asimple modulation scheme, for example, an On-Off Keying (OOK) modulationscheme.

Some demonstrative embodiments are described herein with respect to anOOK modulation scheme. However, in other embodiments the wakeup packetmay include a payload modulated according to any other Amplitude-ShiftKeying (ASK) modulation scheme, a Frequency Shift Keying (FSK)modulation scheme, and/or any other modulation scheme.

Reference is made to FIG. 2, which schematically illustrates a structureof a wakeup packet 200, in accordance with some demonstrativeembodiments.

For example, device 102 (FIG. 1) may be configured to generate and/ortransmit wakeup packet 200; and/or device 140 (FIG. 1) may be configuredto process wakeup packet 200, e.g., received from device 102.

In some demonstrative embodiments, as shown in FIG. 2, wakeup packet 200may include a preamble 202, for example, in accordance with a preamblestructure defined by an IEEE 802.11 Specification, or any otherpreamble.

In some demonstrative embodiments, as shown in FIG. 2, wakeup packet 200may include a payload 204.

In some demonstrative embodiments, payload 204 may be modulated by asimple modulation scheme, for example, an on-off Keying (OOK) modulationscheme.

In some demonstrative embodiments, payload 204 may be modulated using agranularity of an OFDM symbol length, e.g., a granularity of 4microsecond (us).

In other embodiments wakeup packet 200 may include a payload 204modulated according to any other amplitude-shift keying (ASK) modulationscheme, a Frequency Shift Keying (FSK) modulation scheme, and/or anyother modulation scheme.

In some demonstrative embodiments, payload 204 may include a wakeuppreamble 212.

In some demonstrative embodiments, wakeup preamble 212 may include asequence of bits, for example, configured to identify wakeup packet 200.

In some demonstrative embodiments, as shown in FIG. 2, payload 204 mayinclude a Receiver Identifier (ID) 214, which may include, for example,address information of a device to receive wakeup packet 200, e.g.,device 140 (FIG. 1).

In some demonstrative embodiments, the address information may include,for example, a MAC address of a device (“the wakeup Rx STA”), which isto receive wakeup packet 200, a partial MAC address of the wakeup RxSTA, a hashed value of the MAC addresses of the wakeup Rx STA and thesender of wakeup packet 200, e.g., device 102 (FIG. 1), and/or any othervalue to indicate the wakeup Rx STA to receive wakeup packet 200.

In some demonstrative embodiments, as shown in FIG. 2, payload 204 mayoptionally include a data field 216.

In some demonstrative embodiments, as shown in FIG. 2, payload 204 mayoptionally include a Length field 218, for example, to indicate thelength of the data field 216.

In some demonstrative embodiments, as shown in FIG. 2, payload 204 mayinclude a Frame Check Sequence (FCS) field 220, for example, including aCyclic Redundancy Check (CRC) value, e.g. a CRC-8 value or a CRC-16value, for example, of Receiver ID field 214 and the data field 216.

Reference is made to FIG. 3, which schematically illustrates atransmission of a wakeup packet 300, in accordance with somedemonstrative embodiments.

In one example, device 102 (FIG. 1) may transmit wakeup packet 300 todevice 140 (FIG. 1), for example, to indicate to wakeup receiver 150(FIG. 1) that radio 144 (FIG. 1) is to be woken up.

As shown in FIG. 3, wakeup packet 300 may include a legacy preamble 302,e.g., legacy preamble 202 (FIG. 2), followed by a payload 304, e.g.,payload 204 (FIG. 2).

In some demonstrative embodiments, legacy preamble 302 may be modulatedaccording to an OFDM modulation scheme.

In some demonstrative embodiments, payload 304 may be modulatedaccording to the OOK modulation scheme, e.g., as described above.

As shown in FIG. 3, payload 304 may include a wakeup preamble 312, e.g.,wakeup preamble 212 (FIG. 2).

Referring back to FIG. 1, in some demonstrative embodiments, it may bedisadvantage and/or inefficient to use a wakeup preamble having afixed-length (the “fixed-length wakeup preamble”).

In some demonstrative embodiments, the fixed-length wakeup preamble maybe designed to provide a predefined transmission range (“WiFitransmission range”), e.g., in accordance with an IEEE 802.11Specification.

In some demonstrative embodiments, the fixed-length wake-up preamble maynot be sufficient to meet varying system requirements. For example, thefixed-length wakeup preamble may not provide enough flexibility fordifferent transmission ranges.

In some demonstrative embodiments, transmission ranges may be varied,for example, based on a density of the wireless medium 103.

In some demonstrative embodiments, the fixed-length wake-up preamble mayhave a length of 30 bits, for example, to meet one or more sensitivityrequirements, for example, a sensitivity requirement (“the WiFisensitivity requirement”) in accordance with an IEEE 802.11Specification, e.g., a sensitivity of −82 decibel-milliwatts (dBm);and/or to achieve a desired Packet Error Rate (PER) performance, forexample, to provide a predefined transmission range.

In some demonstrative embodiments, if a bit of the 30 bits is using anOFDM symbol having a duration of 4 μs, an entire duration of thefixed-length wakeup preamble may be 120 μs, e.g., 30 bits×4 μs, whichmay occupy, approximately 25 percent of the entire duration of thewakeup packet, e.g., wakeup packet 200 (FIG. 2).

In some demonstrative embodiments, in a dense Wi-Fi environment, e.g.,in accordance with the IEEE 802.11ax specification, a transmission rangeof the wakeup packet may be reduced, for example, to avoid interferencebetween devices in the dense environment. Accordingly, using thefixed-length wake-up preamble, which occupies a large portion of theduration of the wakeup packet, may increase power consumption of adevice transmitting the wakeup packet (the “wakeup Tx STA/device”),and/or may not be flexible enough to provide different sensitivityrequirements and/or transmission ranges, e.g., for transmission of thewakeup packet.

In some demonstrative embodiments, device 102 and/or device 140 may beconfigured to perform one or more methods and/or procedures to matchbetween a range of a wakeup packet transmission and a Wi-Fi transmissionrange, for example, by using different wakeup preamble designs,structures and/or lengths, e.g., as described below.

In some demonstrative embodiments, using the different wakeup preambledesigns may enable an LP-WUR device to be associated with one or moreAPs, which may be located in proximity to the LP-WUR device, forexample, instead of being associated with faraway APs, which are locatedfaraway from the LP-WUR device.

In some demonstrative embodiments, using the different wakeup preambledesigns may enable an LP-WUR device to avoid attempting unnecessaryhandoffs, e.g., with the faraway APs. Accordingly, using the differentwakeup preamble designs may improve a performance of system 100.

In some demonstrative embodiments, device 102 and/or device 140 may beconfigured to dynamically adjust a length of the wakeup preamble, forexample, based on a transmission range requirement of the wakeup Txdevice, e.g., device 102.

In some demonstrative embodiments, device 102 may be configured toreduce a length of the wakeup preamble, for example, if device 102 is ina dense network, e.g., a Wi-Fi network, having a reduced transmissionrange requirement.

In some demonstrative embodiments, device 102 may be configured toreduce the length of the wakeup preamble, for example, to match thereduced transmission range requirement.

In some demonstrative embodiments, device 102 and/or device 140 may beconfigured to reduce an overhead, e.g., in terms of utilization of WM103 and energy consumption of device 102 and/or device 140, for example,for processing the wakeup packet transmission.

In some demonstrative embodiments, device 102 and/or device 140 may beconfigured to reduce the overhead, for example, by reducing the lengthof the wakeup preamble, e.g., when a transmission range of the wakeuppacket can be reduced, e.g., as described below.

Reference is made to FIG. 4, which schematically illustrates a firsttransmission scheme 410 of a transmission of a first wakeup packet 412,and a second transmission scheme 420 of a transmission of second wakeuppacket 422, in accordance with some demonstrative embodiments.

In some demonstrative embodiments, as shown in FIG. 4, wakeup packets412 and 422 may be transmitted by a wakeup Tx device 402, e.g., an AP.For example, wakeup Tx device 402 may perform the functionality ofdevice 102 (FIG. 2).

In some demonstrative embodiments, as shown in FIG. 4, wakeup packet 412may be transmitted in a sparse environment.

In some demonstrative embodiments, as shown in FIG. 4, transmissions inthe sparse environment may be performed using a first Modulation andCoding Scheme, e.g., an MCS0, for example, using Binary Phase ShiftKeying (BPSK) at a data rate of ½.

In some demonstrative embodiments, as shown in FIG. 4, the transmissionsin the sparse environment may cover a first coverage range 414, forexample, to meet a first sensitivity requirement (“the MCS0 sensitivityrequirement”) for the MCS0, for example, a sensitivity requirement of−82 dBm.

In some demonstrative embodiments, as shown in FIG. 4, a transmission ofwakeup packet 412 may be configured to meet the MCS0 sensitivityrequirement.

In some demonstrative embodiments, as shown in FIG. 4, the transmissionof wakeup packet 412 may also be configured to cover the range 414, forexample, to meet the MCS0 sensitivity requirement.

In some demonstrative embodiments, wakeup packet 412 may include awakeup preamble having a preamble length of 30 bits, for example, tocover the range 414 and to meet the MCS0 sensitivity requirement.

In some demonstrative embodiments, as shown in FIG. 4, wakeup packet 422may be transmitted in a dense environment.

In some demonstrative embodiments, as shown in FIG. 4, transmissions inthe dense environment may use a higher data rate, for example, accordingto a second MCS, e.g., an MCS1.

In some demonstrative embodiments, as shown in FIG. 4, the transmissionsin the dense environment may cover a second coverage range 424, forexample, to meet a sensitivity requirement (the “MCS1 sensitivityrequirement”) for the MCS1, for example, a sensitivity requirement of−79 dBm.

In some demonstrative embodiments, if a transmission of wakeup packet422 is configured to meet the MCS1 sensitivity requirement, the preamblelength of the wakeup preamble of wakeup packet 422 may be reduced, e.g.,to a length of 15 bits, while still meeting the MCS1 sensitivityrequirement and the coverage range 424.

Referring back to FIG. 1, in some demonstrative embodiments, device 102may be configured to determine a preamble length of a wakeup preamble ofa wakeup packet, e.g., as described below.

In some demonstrative embodiments, device 102 may be configured todetermine the preamble length, for example, based on an MCS of atransmission from device 102, e.g., as described below.

In some demonstrative embodiments, device 102 may be configured toannounce to one or more other devices, e.g., device 140, a mappingbetween the MCS and the preamble length, e.g., as described below.

In some demonstrative embodiments, controller 124 may control, causeand/or trigger device 102 to transmit a frame including mappinginformation to map a plurality of Modulation and Coding Schemes (MCS) toa respective plurality of preamble lengths.

In some demonstrative embodiments, the frame including the mappinginformation may include a beacon frame transmission from device 102, forexample, if device 102 operates as an AP.

In some demonstrative embodiments, the frame including the mappinginformation may include a probe response frame from device 102, e.g., inresponse to a probe request frame from device 140.

In some demonstrative embodiments, the mapping information may include atable including the plurality of MCS and the respective plurality ofpreamble lengths, for example, in terms of a predefined value, denotedN, e.g., as follows:

TABLE 1 Receiver sensitivity requirement Wake-up preamble length MCS0(BPSK ½) −82 dBm   N bits MCS1 (QPSK ½) −79 dBm N/2 bits MCS2 (QPSK ¾)−77 dBm N/4 bits MCS3 (16-QAM ½) −74 dBm N/8 bits

In some demonstrative embodiments, the value of N may be 30, or anyother integer value.

In other embodiments, any other mapping between the MCS and the preamblelength may be used.

In some demonstrative embodiments, Table 1 may include a mapping betweenthe plurality of MCS and the respective plurality of preamble lengths,e.g., in accordance with MCS of an IEEE 802.11ac standard and a 20 MHzPPDU.

In some demonstrative embodiments, controller 154 may control, causeand/or trigger device 140 to process the frame from device 102 includingthe mapping information to map the plurality of MCS to the plurality ofpreamble lengths.

In some demonstrative embodiments, controller 154 and/or controller 159may control, cause and/or trigger device 140 to switch radio 144 to apower save mode.

In some demonstrative embodiments, device 140 may be configured to waitfor a wakeup packet, for example, to wake up radio 144 to receive data.

In some demonstrative embodiments, controller 124 may be configured tocontrol, cause and/or trigger device 102 to generate a wakeup packetincluding a preamble having a preamble length corresponding to an MCS ofa non-wakeup transmission from device 102, e.g., as described below.

For example, the non-wakeup transmission from device 102 may use theMCS2. According to this example, controller 124 may control, causeand/or trigger device 102 to generate a wakeup packet including apreamble having a preamble length (“the selected preamble length”)corresponding to the MCS2, e.g., a preamble length of N/4 bits accordingto Table 1.

In some demonstrative embodiments, controller 124 may control, causeand/or trigger device 102 to transmit the wakeup packet to device 140.

In some demonstrative embodiments, controller 124 may control, causeand/or trigger message processor 128 to generate the wakeup packetincluding the preamble having the selected preamble length, and/orcontroller 124 may control, cause and/or trigger transmitter 118 totransmit the wakeup packet to device 140.

In some demonstrative embodiments, device 140 may receive the wakeuppacket including the preamble having the preamble length correspondingto the MCS of the non-wakeup transmission from device 102.

In some demonstrative embodiments, controller 159 may control, causeand/or trigger wakeup receiver 150 to process the wakeup packetincluding the preamble having the preamble length corresponding to theMCS of the non-wakeup transmission from device 102.

In some demonstrative embodiments, controller 159 may determine whetheror not to wakeup radio 144, for example, based on the payload of thewakeup packet.

In some demonstrative embodiments, the non-wakeup transmission mayinclude a beacon frame transmission from device 102.

In some demonstrative embodiments, controller 124 may control, causeand/or trigger device 102 to generate the wakeup packet including apreamble length corresponding to an MCS (“the beacon MCS”) of the beaconframe transmission from device 102.

For example, device 102 may generate the wakeup packet including apreamble length of 15-bits, e.g., N=30/2, for example, if MCS1 is usedfor the beacon frame transmission from device 102.

In some demonstrative embodiments, the non-wakeup transmission mayinclude a data transmission from device 102.

In some demonstrative embodiments, controller 124 may be configured tocontrol, cause and/or trigger device 102 to generate the wakeup packetincluding a preamble corresponding to an MCS (“the data MCS”) of thedata transmission from device 102.

For example, device 102 may generate the wakeup packet including apreamble length of about N/4 bits, e.g., 8 bits, for example, if MCS2 isused for the data transmission from device 102, e.g., in accordance withTable 1.

In some demonstrative embodiments, device 102 may be configured todetermine the preamble length, for example, according to a first lengthsetting scheme.

In some demonstrative embodiments, an AP, e.g., device 102, may beconfigured to use the MCS of the same non-wakeup transmission todetermine the preamble length, for example, regardless of the purpose ofthe wake-up packet.

In some demonstrative embodiments, device 102 may be configured todetermine the preamble length, for example, based on the MCS used in abeacon frame from device 102, e.g., by selecting a preamble length inTable 1 corresponding to the MCS used in the beacon frame.

In some demonstrative embodiments, controller 124 may be configured tocontrol, cause and/or trigger device 102 to generate the wakeup packetincluding a preamble length corresponding to the MCS of the beacon frametransmission from device 102.

In some demonstrative embodiments, device 140 may receive the beaconframe from device 102, and may be aware of the MCS of the beacon frame.

In some demonstrative embodiments, device 140 may determine the preamblelength, for example, based on the MCS of the beacon frame and themapping information received from device 102. Accordingly, device 140may be aware of the preamble length of the wakeup packet to be receivedfrom device 102.

In one example, a STA, e.g., device 140, may use the wake-up packetpreamble that corresponds to the MCS, which an AP, e.g., device 102,uses for the beacon transmission. The STA may determine the length ofthe wakeup preamble, for example, based on the mapping informationtransmitted by the AP.

In some demonstrative embodiments, device 102 may be configured todetermine the preamble length of the wakeup packet, for example,according to a second length setting scheme.

In some demonstrative embodiments, an AP, e.g., device 102, may beconfigured to use the MCS of different non-wakeup transmissions todetermine the preamble length, for example, based on the purpose of thewake-up packet.

In some demonstrative embodiments, device 102 may be configured toselect between using an MCS of a first non-wakeup transmission todetermine the preamble length, and an MCS of second non-wakeuptransmission to determine the preamble length, for example, based on thepurpose of the wakeup packet.

In some demonstrative embodiments, device 102 may be configured toselect between an MCS of a beacon frame, and an MCS of a data frametransmission, for example, to determine the preamble length of thewakeup packet.

In some demonstrative embodiments, device 102 may select to use the MCSof the beacon frame, for example, if the wakeup packet is configured toinclude beacon information.

In some demonstrative embodiments, device 102 may select to use the MCSof the data transmission, for example, if the wakeup packet isconfigured to wakeup a radio of the wakeup RX STA.

In one example, if the wake-up packet is configured as a “wakeupbeacon”, which includes beacon information, e.g., partial beaconinformation, e.g., if data field 216 (FIG. 2) includes the partialbeacon information, then the AP may select to use a preamble lengthcorresponding to the MCS used in the beacon frame.

In another example, if the wake-up packet is configured to wake-up aWi-Fi radio, e.g., radio 144, for example, to communicate data with theradio, then the AP may select to use a preamble length corresponding tothe MCS to be used in a following data packet transmission to the radio,e.g., as described below.

In some demonstrative embodiments, controller 124 may be configured tocontrol, cause and/or trigger device 102 to generate the wakeup packetincluding the preamble having a length corresponding to an MCS of abeacon frame transmission from device 102, for example, when the wakeuppacket, for example, a payload, e.g., payload 204 (FIG. 2), of thewakeup packet includes beacon information, e.g., the partial beaconinformation.

In some demonstrative embodiments, device 102 may transmit the wakeuppacket, and device 140 may receive the wakeup packet.

In some demonstrative embodiments, wakeup receiver 150 may process thewakeup beacon, for example, to maintain association and/orsynchronization with device 102.

In some demonstrative embodiments, wakeup receiver 150 may notnecessarily wake up radio 144, for example, when processing the wakeupbeacon.

In one example, when an AP, e.g., device 102, transmits a wakeup packetincluding partial beacon information, e.g., the wakeup beacon, the APmay select the preamble length of the wakeup packet based on the MCS atwhich the AP transmits a beacon frame. For example, if the AP uses theMCS1, e.g., a QPSK ½ rate, to transmit the beacon frame, for example,due to a shorter coverage range, the AP may use a shorter wake-uppreamble, e.g. having a preamble length of 15 bits, e.g., instead of apreamble length of 30 bits.

In some demonstrative embodiments, reducing the length of the wakeuppreamble of the wakeup beacon, may match between the coverage range ofthe wakeup beacon and the converge range of the beacon frametransmission, e.g., a regular beacon frame transmission, from device102.

In some demonstrative embodiments, device 140 may receive the wakeuppacket including the preamble having the preamble length correspondingto the beacon MCS.

In some demonstrative embodiments, wakeup receiver 150 may process thewakeup beacon, for example, to maintain association and/orsynchronization with device 102.

In some demonstrative embodiments, controller 124 may be configured tocontrol, cause and/or trigger device 102 to generate the wakeup packetincluding the preamble having a length corresponding to an MCS, e.g.,the data MCS, of a data transmission to device 102, for example, whenthe wakeup packet, for example, a payload of the wakeup packet, includesa wakeup indication to wakeup radio 144 of device 140.

In some demonstrative embodiments, controller 154 may be configured tocontrol, cause and/or trigger device 140 to transmit to device 102 MCSinformation to indicate the MCS to be applied to the data transmissionfrom device 102 to device 140. For example, device 140 to transmit todevice 102 the MCS information to indicate that the MCS3 to be appliedto the data transmission.

In some demonstrative embodiments, controller 124 may be configured tocontrol, cause and/or trigger device 102 to determine the MCS to be usedfor transmitting the data transmission to device 140 based on the MCSinformation received from device 140.

In some demonstrative embodiments, controller 124 may be configured tocontrol, cause and/or trigger transmitter 118 to transmit the wakeuppacket including the preamble having the length corresponding to the MCSreceived from device 140, e.g., the MCS3.

In some demonstrative embodiments, device 140 may receive the wakeuppacket including the preamble having the length corresponding to the MCSof the data transmission, e.g., the MCS3.

In some demonstrative embodiments, controller 157 may be configured tocontrol, cause and/or trigger wakeup receiver 150 to process the wakeuppacket including the preamble having the length corresponding to the MCSof the data transmission.

In some demonstrative embodiments, controller 157 may be configured tocontrol, cause and/or trigger device 140 to wakeup the radio 144 toreceive the data transmission from device 102, e.g., using the MCSindicated by the MCS information.

In some demonstrative embodiments, when an AP, e.g., device 102,transmits the wakeup packet to indicate to a STA, e.g., device 140, thatdata is to be transmitted to the STA, e.g., as part of a unicast packet,the AP may be configured to select between setting a preamble length ofthe wakeup packet according to a data MCS, and setting the preamblelength of the wakeup packet according to a beacon MCS. For example, theAP may be configured to select a preamble length for the wakeup packetbased on the MCS of the data transmission, e.g., the MCS2, for example,if the AP uses a data MCS, e.g., MCS2, for example, which is higher thana beacon MCS, e.g., MCS1. For example, according to Table 1, the AP mayselect to use a preamble length corresponding to the MCS2, e.g., apreamble length having N/4 bits.

In one example, a STA, device 140, may notify the AP, for example,before the STA turns off its radio and enters the sleep mode, of an MCS,e.g., MCS2, that the STA will be using for processing a data packettransmission. The STA may determine the preamble length, for example,based on the mapping information transmitted by the AP to the STA.

In some demonstrative embodiments, a STA, e.g., device 140, may beconfigured to run a correlation-based preamble detection mechanism, forexample, to detect the preamble length, e.g., of a beacon frametransmission and/or data transmissions, for example, in order to detectan incoming wakeup packet acquisition, e.g., when using the secondlength setting scheme.

In some demonstrative embodiments, the second length-setting scheme mayenable device 102 to save additional power and bandwidth, for example,when the MCS of the data transmission is higher than the MCS of thebeacon frame.

In some demonstrative embodiments, devices 102 and 140 may be configuredto signal and/or negotiate a length setting scheme, e.g., to set and/orselect between the first length setting scheme and the second lengthsetting scheme, for example, during an initialization or capabilityexchange phase.

In some demonstrative embodiments, device 102 and device 140 maycommunicate according to a length setting scheme, for example, oncedevices 102 and 140 agree on a length setting scheme, and/or once one ofdevices 102 and 104 indicates to the other device, which length settingscheme is to be used.

In other embodiments, the length-setting scheme may be predefined,preconfigured, and/or predetermined.

Reference is made to FIG. 5, which schematically illustrates a method ofcommunicating a wakeup packet, in accordance with some demonstrativeembodiments. For example, one or more of the operations of the method ofFIG. 5 may be performed by one or more elements of a system, e.g.,system 100 (FIG. 1), for example, one or more wireless devices, e.g.,device 102 (FIG. 1), and/or device 140 (FIG. 1); a controller, e.g.,controller 159 (FIG. 1), controller 124 (FIG. 1) and/or controller 154(FIG. 1); a radio, e.g., radio 114 (FIG. 1) and/or radio 144 (FIG. 1); atransmitter, e.g., transmitter 118 and/or transmitter 148 (FIG. 1); areceiver e.g., receiver 116, receiver 156 and/or receiver 146 (FIG. 1);a wakeup receiver, e.g., wakeup receiver 150 (FIG. 1); and/or a messageprocessor, e.g., message processor 157 (FIG. 1), message processor 128(FIG. 1) and/or message processor 158 (FIG. 1).

As indicated at block 502, the method may include transmitting from afirst device a frame including mapping information to map a plurality ofModulation and Coding Schemes (MCS) to a respective plurality ofpreamble lengths. For example, controller 124 (FIG. 1) may control,cause and/or trigger transmitter 118 (FIG. 1) and/or radio 124 (FIG. 1)to transmit the frame including mapping information to map a pluralityof Modulation and Coding Schemes (MCS) to a respective plurality ofpreamble lengths, e.g., as described above.

As indicated at block 504, the method may include processing the frameincluding the mapping information at a second wireless device. Forexample, controller 154 (FIG. 1) may control, cause and/or triggerreceiver 146 (FIG. 1) to process the frame including the mappinginformation, e.g., as described above.

As indicated at block 506, the method may include switching a radio ofthe second wireless device to a power save mode. For example, controller154 (FIG. 1) may control, cause and/or trigger device 14 (FIG. 1) toswitch radio 144 (FIG. 1) of to the power save mode, e.g., as describedabove.

As indicated at block 508, the method may include generating a wakeuppacket including a preamble having a preamble length corresponding to anMCS of a non-wakeup transmission from the first wireless device. Forexample, controller 124 (FIG. 1) may control, cause and/or triggermessage processor 128 (FIG. 1) and/or radio 124 (FIG. 1) to generate thewakeup packet including the preamble having a preamble lengthcorresponding to an MCS of a non-wakeup transmission from the firstwireless device, for example, according to Table 1, e.g., as describedabove.

As indicated at block 509, generating the wakeup packet may includegenerating the wakeup preamble having the preamble length correspondingto an MCS of a beacon frame transmission. For example, controller 124(FIG. 1) may control, cause and/or trigger message processor 128(FIG. 1) and/or radio 124 (FIG. 1) to generate the wakeup packetincluding the preamble having a preamble length of the beacon frametransmission, e.g., as described above.

As indicated at block 511, generating the wakeup packet may includegenerating the wakeup preamble having the preamble length correspondingto an MCS of a data transmission. For example, controller 124 (FIG. 1)may control, cause and/or trigger message processor 128 (FIG. 1) and/orradio 124 (FIG. 1) to generate the wakeup packet including the preamblehaving a preamble length of the data transmission, e.g., as describedabove.

As indicated at block 510, the method may include transmitting thewakeup packet to the second wireless device. For example, controller 124(FIG. 1) may control, cause and/or trigger radio 124 (FIG. 1) totransmit the wakeup packet to device 140 (FIG. 1), e.g., as describedabove.

As indicated at block 512, the method may include processing the wakeuppacket received from the first wireless device. For example, controller159 (FIG. 1) may control, cause and/or trigger wakeup receiver 150(FIG. 1) to process the wakeup packet, e.g., as described above.

Reference is made to FIG. 6, which schematically illustrates a productof manufacture 600, in accordance with some demonstrative embodiments.Product 600 may include a non-transitory machine-readable storage medium602 to store logic 604, which may be used, for example, to perform atleast part of the functionality of device 62 (FIG. 1), device 140 (FIG.1), radio 114 (FIG. 1), radio 144 (FIG. 1), wakeup receiver 150 (FIG.1), transmitter 118 (FIG. 1), transmitter 148 (FIG. 1), receiver 116(FIG. 1), receiver 146 (FIG. 1), receiver 156 (FIG. 1), controller 124(FIG. 1), controller 154 (FIG. 1), controller 159 (FIG. 1), messageprocessor 128 (FIG. 1), message processor 128 (FIG. 1), and/or messageprocessor 158 (FIG. 1), message processor 157 (FIG. 1), and/or toperform one or more operations of FIG. 5, and/or one or more operationsdescribed herein. The phrase “non-transitory machine-readable medium” isdirected to include all computer-readable media, with the sole exceptionbeing a transitory propagating signal.

In some demonstrative embodiments, product 600 and/or machine-readablestorage medium 602 may include one or more types of computer-readablestorage media capable of storing data, including volatile memory,non-volatile memory, removable or non-removable memory, erasable ornon-erasable memory, writeable or re-writeable memory, and the like. Forexample, machine-readable storage medium 602 may include, RAM, DRAM,Double-Data-Rate DRAM (DDR-DRAM), SDRAM, static RAM (SRAM), ROM,programmable ROM (PROM), erasable programmable ROM (EPROM), electricallyerasable programmable ROM (EEPROM), Compact Disk ROM (CD-ROM), CompactDisk Recordable (CD-R), Compact Disk Rewriteable (CD-RW), flash memory(e.g., NOR or NAND flash memory), content addressable memory (CAM),polymer memory, phase-change memory, ferroelectric memory,silicon-oxide-nitride-oxide-silicon (SONOS) memory, a disk, a floppydisk, a hard drive, an optical disk, a magnetic disk, a card, a magneticcard, an optical card, a tape, a cassette, and the like. Thecomputer-readable storage media may include any suitable media involvedwith downloading or transferring a computer program from a remotecomputer to a requesting computer carried by data signals embodied in acarrier wave or other propagation medium through a communication link,e.g., a modem, radio or network connection.

In some demonstrative embodiments, logic 604 may include instructions,data, and/or code, which, if executed by a machine, may cause themachine to perform a method, process and/or operations as describedherein. The machine may include, for example, any suitable processingplatform, computing platform, computing device, processing device,computing system, processing system, computer, processor, or the like,and may be implemented using any suitable combination of hardware,software, firmware, and the like.

In some demonstrative embodiments, logic 604 may include, or may beimplemented as, software, a software module, an application, a program,a subroutine, instructions, an instruction set, computing code, words,values, symbols, and the like. The instructions may include any suitabletype of code, such as source code, compiled code, interpreted code,executable code, static code, dynamic code, and the like. Theinstructions may be implemented according to a predefined computerlanguage, manner or syntax, for instructing a processor to perform acertain function. The instructions may be implemented using any suitablehigh-level, low-level, object-oriented, visual, compiled and/orinterpreted programming language, such as C, C++, Java, BASIC, Matlab,Pascal, Visual BASIC, assembly language, machine code, and the like.

EXAMPLES

The following examples pertain to further embodiments.

Example 1 includes an apparatus comprising circuitry configured to causea first wireless device to transmit a frame comprising mappinginformation to map a plurality of Modulation and Coding Schemes (MCS) toa respective plurality of preamble lengths; generate a wakeup packetcomprising a preamble having a preamble length of the plurality ofpreamble lengths corresponding to an MCS of a non-wakeup transmissionfrom the first wireless device; and

transmit the wakeup packet to a second wireless device.

Example 2 includes the subject matter of Example 1, and optionally,wherein the non-wakeup transmission comprises a beacon frametransmission.

Example 3 includes the subject matter of Example 1, and optionally,wherein the non-wakeup transmission comprises a data transmission to thesecond wireless device.

Example 4 includes the subject matter of Example 1, and optionally,wherein the apparatus is configured to cause the first wireless deviceto, when the wakeup packet comprises beacon information, generate thewakeup packet comprising the preamble having a length corresponding toan MCS of a beacon frame transmission from the first wireless device.

Example 5 includes the subject matter of Example 1, and optionally,wherein the apparatus is configured to cause the first wireless deviceto, when the wakeup packet comprises a wakeup indication to wakeup aradio of the second wireless device, generate the wakeup packetcomprising the preamble having a length corresponding to an MCS of adata transmission to the second wireless device.

Example 6 includes the subject matter of Example 5, and optionally,wherein the apparatus is configured to cause the first wireless deviceto determine the MCS of the data transmission based on MCS informationreceived from the second wireless device.

Example 7 includes the subject matter of any one of Examples 1-6, andoptionally, wherein the preamble of the wakeup packet is modulatedaccording to an Orthogonal Frequency Division Multiplexing (OFDM)scheme, and a payload of the wakeup packet is modulated according to anOn-Off keying (OOK) modulation scheme.

Example 8 includes the subject matter of any one of Examples 1-7, andoptionally, wherein the frame comprising the mapping informationcomprises a beacon frame or a probe response frame.

Example 9 includes the subject matter of any one of Examples 1-8, andoptionally, comprising an Access Point (AP).

Example 10 includes the subject matter of any one of Examples 1-9, andoptionally, comprising a radio to transmit the wakeup packet.

Example 11 includes the subject matter of any one of Examples 1-10, andoptionally, comprising one or more antennas, a processor, and a memory.

Example 12 includes a system of wireless communication comprising afirst wireless device comprising circuitry to cause the first wirelessdevice to transmit a frame comprising mapping information to map aplurality of Modulation and Coding Schemes (MCS) to a respectiveplurality of preamble lengths; generate a wakeup packet comprising apreamble having a preamble length of the plurality of preamble lengthscorresponding to an MCS of a non-wakeup transmission from the firstwireless device; and transmit the wakeup packet to a second wirelessdevice.

Example 13 includes the subject matter of Example 12, and optionally,wherein the non-wakeup transmission comprises a beacon frametransmission.

Example 14 includes the subject matter of Example 12, and optionally,wherein the non-wakeup transmission comprises a data transmission to thesecond wireless device.

Example 15 includes the subject matter of Example 12, and optionally,wherein the circuitry is configured to cause the first wireless deviceto, when the wakeup packet comprises beacon information, generate thewakeup packet comprising the preamble having a length corresponding toan MCS of a beacon frame transmission from the first wireless device.

Example 16 includes the subject matter of Example 12, and optionally,wherein the circuitry is configured to cause the first wireless deviceto, when the wakeup packet comprises a wakeup indication to wakeup aradio of the second wireless device, generate the wakeup packetcomprising the preamble having a length corresponding to an MCS of adata transmission to the second wireless device.

Example 17 includes the subject matter of Example 16, and optionally,wherein the circuitry is configured to cause the first wireless deviceto determine the MCS of the data transmission based on MCS informationreceived from the second wireless device.

Example 18 includes the subject matter of any one of Examples 12-17, andoptionally, wherein the preamble of the wakeup packet is modulatedaccording to an Orthogonal Frequency Division Multiplexing (OFDM)scheme, and a payload of the wakeup packet is modulated according to anOn-Off keying (OOK) modulation scheme.

Example 19 includes the subject matter of any one of Examples 12-18, andoptionally, wherein the frame comprising the mapping informationcomprises a beacon frame or a probe response frame.

Example 20 includes the subject matter of any one of Examples 12-19, andoptionally, comprising an Access Point (AP).

Example 21 includes the subject matter of any one of Examples 12-20, andoptionally, wherein the first wireless device comprises a radio totransmit the wakeup packet.

Example 22 includes the subject matter of any one of Examples 12-21, andoptionally, wherein the first wireless device comprises one or moreantennas, a processor, and a memory.

Example 23 includes a method to be performed by a first wireless device,the method comprising transmitting a frame comprising mappinginformation to map a plurality of Modulation and Coding Schemes (MCS) toa respective plurality of preamble lengths; generating a wakeup packetcomprising a preamble having a preamble length of the plurality ofpreamble lengths corresponding to an MCS of a non-wakeup transmissionfrom the first wireless device; and transmitting the wakeup packet to asecond wireless device.

Example 24 includes the subject matter of Example 23, and optionally,wherein the non-wakeup transmission comprises a beacon frametransmission.

Example 25 includes the subject matter of Example 23, and optionally,wherein the non-wakeup transmission comprises a data transmission to thesecond wireless device.

Example 26 includes the subject matter of Example 23, and optionally,comprising, when the wakeup packet comprises beacon information,generating the wakeup packet comprising the preamble having a lengthcorresponding to an MCS of a beacon frame transmission from the firstwireless device.

Example 27 includes the subject matter of Example 23, and optionally,comprising, when the wakeup packet comprises a wakeup indication towakeup a radio of the second wireless device, generating the wakeuppacket comprising the preamble having a length corresponding to an MCSof a data transmission to the second wireless device.

Example 28 includes the subject matter of Example 27, and optionally,comprising determining the MCS of the data transmission based on MCSinformation received from the second wireless device.

Example 29 includes the subject matter of any one of Examples 23-28, andoptionally, wherein the preamble of the wakeup packet is modulatedaccording to an Orthogonal Frequency Division Multiplexing (OFDM)scheme, and a payload of the wakeup packet is modulated according to anOn-Off keying (OOK) modulation scheme.

Example 30 includes the subject matter of any one of Examples 23-29, andoptionally, wherein the frame comprising the mapping informationcomprises a beacon frame or a probe response frame.

Example 31 includes the subject matter of any one of Examples 23-30, andoptionally, wherein the first wireless device comprises an Access Point(AP).

Example 32 includes a product comprising one or more tangiblecomputer-readable non-transitory storage media comprisingcomputer-executable instructions operable to, when executed by at leastone computer processor, enable the at least one computer processor toimplement one or more operations at a first wireless device, theoperations comprising transmitting a frame comprising mappinginformation to map a plurality of Modulation and Coding Schemes (MCS) toa respective plurality of preamble lengths; generating a wakeup packetcomprising a preamble having a preamble length of the plurality ofpreamble lengths corresponding to an MCS of a non-wakeup transmissionfrom the first wireless device; and transmitting the wakeup packet to asecond wireless device.

Example 33 includes the subject matter of Example 32, and optionally,wherein the non-wakeup transmission comprises a beacon frametransmission.

Example 34 includes the subject matter of Example 32, and optionally,wherein the non-wakeup transmission comprises a data transmission to thesecond wireless device.

Example 35 includes the subject matter of Example 32, and optionally,wherein the operations comprise, when the wakeup packet comprises beaconinformation, generating the wakeup packet comprising the preamble havinga length corresponding to an MCS of a beacon frame transmission from thefirst wireless device.

Example 36 includes the subject matter of Example 32, and optionally,wherein the operations comprise, when the wakeup packet comprises awakeup indication to wakeup a radio of the second wireless device,generating the wakeup packet comprising the preamble having a lengthcorresponding to an MCS of a data transmission to the second wirelessdevice.

Example 37 includes the subject matter of Example 36, and optionally,wherein the operations comprise determining the MCS of the datatransmission based on MCS information received from the second wirelessdevice.

Example 38 includes the subject matter of any one of Examples 32-37, andoptionally, wherein the preamble of the wakeup packet is modulatedaccording to an Orthogonal Frequency Division Multiplexing (OFDM)scheme, and a payload of the wakeup packet is modulated according to anOn-Off keying (OOK) modulation scheme.

Example 39 includes the subject matter of any one of Examples 32-38, andoptionally, wherein the frame comprising the mapping informationcomprises a beacon frame or a probe response frame.

Example 40 includes the subject matter of any one of Examples 32-39, andoptionally, wherein the first wireless device comprises an Access Point(AP).

Example 41 includes an apparatus of wireless communication by a firstwireless device, the apparatus comprising means for transmitting a framecomprising mapping information to map a plurality of Modulation andCoding Schemes (MCS) to a respective plurality of preamble lengths;means for generating a wakeup packet comprising a preamble having apreamble length of the plurality of preamble lengths corresponding to anMCS of a non-wakeup transmission from the first wireless device; andmeans for transmitting the wakeup packet to a second wireless device.

Example 42 includes the subject matter of Example 41, and optionally,wherein the non-wakeup transmission comprises a beacon frametransmission.

Example 43 includes the subject matter of Example 41, and optionally,wherein the non-wakeup transmission comprises a data transmission to thesecond wireless device.

Example 44 includes the subject matter of Example 41, and optionally,comprising means for, when the wakeup packet comprises beaconinformation, generating the wakeup packet comprising the preamble havinga length corresponding to an MCS of a beacon frame transmission from thefirst wireless device.

Example 45 includes the subject matter of Example 41, and optionally,comprising means for, when the wakeup packet comprises a wakeupindication to wakeup a radio of the second wireless device, generatingthe wakeup packet comprising the preamble having a length correspondingto an MCS of a data transmission to the second wireless device.

Example 46 includes the subject matter of Example 45, and optionally,comprising means for determining the MCS of the data transmission basedon MCS information received from the second wireless device.

Example 47 includes the subject matter of any one of Examples 41-46, andoptionally, wherein the preamble of the wakeup packet is modulatedaccording to an Orthogonal Frequency Division Multiplexing (OFDM)scheme, and a payload of the wakeup packet is modulated according to anOn-Off keying (OOK) modulation scheme.

Example 48 includes the subject matter of any one of Examples 41-47, andoptionally, wherein the frame comprising the mapping informationcomprises a beacon frame or a probe response frame.

Example 49 includes the subject matter of any one of Examples 41-48, andoptionally, wherein the first wireless device comprises an Access Point(AP).

Example 50 includes an apparatus comprising circuitry configured tocause a first wireless device to process a frame received from a secondwireless device, the frame comprising mapping information to map aplurality of Modulation and Coding Schemes (MCS) to a respectiveplurality of preamble lengths; switch a radio of the first wirelessdevice to a power save mode; and process a wakeup packet received fromthe second wireless device, the wakeup packet comprising a preamblehaving a preamble length of the plurality of preamble lengthscorresponding to an MCS of a non-wakeup transmission from the secondwireless device.

Example 51 includes the subject matter of Example 50, and optionally,wherein the non-wakeup transmission comprises a beacon frametransmission from the second wireless device.

Example 52 includes the subject matter of Example 50, and optionally,wherein the non-wakeup transmission comprises a data transmission fromthe second wireless device.

Example 53 includes the subject matter of Example 52, and optionally,wherein the apparatus is configured to cause the first wireless deviceto wakeup the radio to receive the data transmission.

Example 54 includes the subject matter of Example 52, and optionally,wherein the apparatus is configured to cause the first wireless deviceto transmit to the second wireless device MCS information to indicatethe MCS to be applied to the data transmission.

Example 55 includes the subject matter of Example 50, and optionally,wherein the wakeup packet comprises the preamble having a lengthcorresponding to an MCS of a beacon frame transmission from the secondwireless device, when the wakeup packet comprises beacon information.

Example 56 includes the subject matter of Example 50, and optionally,wherein the wakeup packet comprises the preamble having a lengthcorresponding to an MCS of a data transmission from the second wirelessdevice, when the wakeup packet comprises an indication to wakeup theradio.

Example 57 includes the subject matter of any one of Examples 50-56, andoptionally, wherein the apparatus is configured to cause the firstwireless device to demodulate the preamble of the wakeup packetaccording to an Orthogonal Frequency Division Multiplexing (OFDM)scheme, and to demodulate a payload of the wakeup packet according to anOn-Off keying (OOK) modulation scheme.

Example 58 includes the subject matter of any one of Examples 50-57, andoptionally, comprising the radio, and a wakeup receiver to receive thewakeup packet.

Example 59 includes the subject matter of any one of Examples 50-58, andoptionally, comprising one or more antennas, and a memory.

Example 60 includes a system of wireless communication comprising afirst wireless device comprising circuitry to cause the first wirelessdevice to process a frame received from a second wireless device, theframe comprising mapping information to map a plurality of Modulationand Coding Schemes (MCS) to a respective plurality of preamble lengths;switch a radio of the first wireless device to a power save mode; andprocess a wakeup packet received from the second wireless device, thewakeup packet comprising a preamble having a preamble length of theplurality of preamble lengths corresponding to an MCS of a non-wakeuptransmission from the second wireless device.

Example 61 includes the subject matter of Example 60, and optionally,wherein the non-wakeup transmission comprises a beacon frametransmission from the second wireless device.

Example 62 includes the subject matter of Example 60, and optionally,wherein the non-wakeup transmission comprises a data transmission fromthe second wireless device.

Example 63 includes the subject matter of Example 62, and optionally,wherein the circuitry is configured to cause the first wireless deviceto wakeup the radio to receive the data transmission.

Example 64 includes the subject matter of Example 62, and optionally,wherein the circuitry is configured to cause the first wireless deviceto transmit to the second wireless device MCS information to indicatethe MCS to be applied to the data transmission.

Example 65 includes the subject matter of Example 60, and optionally,wherein the wakeup packet comprises the preamble having a lengthcorresponding to an MCS of a beacon frame transmission from the secondwireless device, when the wakeup packet comprises beacon information.

Example 66 includes the subject matter of Example 60, and optionally,wherein the wakeup packet comprises the preamble having a lengthcorresponding to an MCS of a data transmission from the second wirelessdevice, when the wakeup packet comprises an indication to wakeup theradio.

Example 67 includes the subject matter of any one of Examples 60-66, andoptionally, wherein the circuitry is configured to cause the firstwireless device to demodulate the preamble of the wakeup packetaccording to an Orthogonal Frequency Division Multiplexing (OFDM)scheme, and to demodulate a payload of the wakeup packet according to anOn-Off keying (OOK) modulation scheme.

Example 68 includes the subject matter of any one of Examples 60-67, andoptionally, wherein the first wireless device comprises the radio, and awakeup receiver to receive the wakeup packet.

Example 69 includes the subject matter of any one of Examples 60-68, andoptionally, wherein the first wireless device comprises one or moreantennas, and a memory.

Example 70 includes a method to be performed by a first wireless device,the method comprising processing a frame received from a second wirelessdevice, the frame comprising mapping information to map a plurality ofModulation and Coding Schemes (MCS) to a respective plurality ofpreamble lengths; switching a radio of the first wireless device to apower save mode; and processing a wakeup packet received from the secondwireless device, the wakeup packet comprising a preamble having apreamble length of the plurality of preamble lengths corresponding to anMCS of a non-wakeup transmission from the second wireless device.

Example 71 includes the subject matter of Example 70, and optionally,wherein the non-wakeup transmission comprises a beacon frametransmission from the second wireless device.

Example 72 includes the subject matter of Example 70, and optionally,wherein the non-wakeup transmission comprises a data transmission fromthe second wireless device.

Example 73 includes the subject matter of Example 72, and optionally,comprising waking up the radio to receive the data transmission.

Example 74 includes the subject matter of Example 72, and optionally,comprising transmitting to the second wireless device MCS information toindicate the MCS to be applied to the data transmission.

Example 75 includes the subject matter of Example 70, and optionally,wherein the wakeup packet comprises the preamble having a lengthcorresponding to an MCS of a beacon frame transmission from the secondwireless device, when the wakeup packet comprises beacon information.

Example 76 includes the subject matter of Example 70, and optionally,wherein the wakeup packet comprises the preamble having a lengthcorresponding to an MCS of a data transmission from the second wirelessdevice, when the wakeup packet comprises an indication to wakeup theradio.

Example 77 includes the subject matter of any one of Examples 70-76, andoptionally, comprising demodulating the preamble of the wakeup packetaccording to an Orthogonal Frequency Division Multiplexing (OFDM)scheme, and to demodulate a payload of the wakeup packet according to anOn-Off keying (OOK) modulation scheme.

Example 78 includes a product comprising one or more tangiblecomputer-readable non-transitory storage media comprisingcomputer-executable instructions operable to, when executed by at leastone computer processor, enable the at least one computer processor toimplement one or more operations at a first wireless device, theoperations comprising processing a frame received from a second wirelessdevice, the frame comprising mapping information to map a plurality ofModulation and Coding Schemes (MCS) to a respective plurality ofpreamble lengths; switching a radio of the first wireless device to apower save mode; and processing a wakeup packet received from the secondwireless device, the wakeup packet comprising a preamble having apreamble length of the plurality of preamble lengths corresponding to anMCS of a non-wakeup transmission from the second wireless device.

Example 79 includes the subject matter of Example 78, and optionally,wherein the non-wakeup transmission comprises a beacon frametransmission from the second wireless device.

Example 80 includes the subject matter of Example 78, and optionally,wherein the non-wakeup transmission comprises a data transmission fromthe second wireless device.

Example 81 includes the subject matter of Example 80, and optionally,wherein the operations comprise waking up the radio to receive the datatransmission.

Example 82 includes the subject matter of Example 80, and optionally,wherein the operations comprise transmitting to the second wirelessdevice MCS information to indicate the MCS to be applied to the datatransmission.

Example 83 includes the subject matter of Example 78, and optionally,wherein the wakeup packet comprises the preamble having a lengthcorresponding to an MCS of a beacon frame transmission from the secondwireless device, when the wakeup packet comprises beacon information.

Example 84 includes the subject matter of Example 78, and optionally,wherein the wakeup packet comprises the preamble having a lengthcorresponding to an MCS of a data transmission from the second wirelessdevice, when the wakeup packet comprises an indication to wakeup theradio.

Example 85 includes the subject matter of any one of Examples 78-84, andoptionally, wherein the operations comprise demodulating the preamble ofthe wakeup packet according to an Orthogonal Frequency DivisionMultiplexing (OFDM) scheme, and to demodulate a payload of the wakeuppacket according to an On-Off keying (OOK) modulation scheme.

Example 86 includes an apparatus of wireless communication by a firstwireless device, the apparatus comprising means for processing a framereceived from a second wireless device, the frame comprising mappinginformation to map a plurality of Modulation and Coding Schemes (MCS) toa respective plurality of preamble lengths; means for switching a radioof the first wireless device to a power save mode; and means forprocessing a wakeup packet received from the second wireless device, thewakeup packet comprising a preamble having a preamble length of theplurality of preamble lengths corresponding to an MCS of a non-wakeuptransmission from the second wireless device.

Example 87 includes the subject matter of Example 86, and optionally,wherein the non-wakeup transmission comprises a beacon frametransmission from the second wireless device.

Example 88 includes the subject matter of Example 86, and optionally,wherein the non-wakeup transmission comprises a data transmission fromthe second wireless device.

Example 89 includes the subject matter of Example 88, and optionally,comprising means for waking up the radio to receive the datatransmission.

Example 90 includes the subject matter of Example 88, and optionally,comprising means for transmitting to the second wireless device MCSinformation to indicate the MCS to be applied to the data transmission.

Example 91 includes the subject matter of Example 86, and optionally,wherein the wakeup packet comprises the preamble having a lengthcorresponding to an MCS of a beacon frame transmission from the secondwireless device, when the wakeup packet comprises beacon information.

Example 92 includes the subject matter of Example 86, and optionally,wherein the wakeup packet comprises the preamble having a lengthcorresponding to an MCS of a data transmission from the second wirelessdevice, when the wakeup packet comprises an indication to wakeup theradio.

Example 93 includes the subject matter of any one of Examples 86-92, andoptionally, comprising means for demodulating the preamble of the wakeuppacket according to an Orthogonal Frequency Division Multiplexing (OFDM)scheme, and to demodulate a payload of the wakeup packet according to anOn-Off keying (OOK) modulation scheme.

Functions, operations, components and/or features described herein withreference to one or more embodiments, may be combined with, or may beutilized in combination with, one or more other functions, operations,components and/or features described herein with reference to one ormore other embodiments, or vice versa.

While certain features have been illustrated and described herein, manymodifications, substitutions, changes, and equivalents may occur tothose skilled in the art. It is, therefore, to be understood that theappended claims are intended to cover all such modifications and changesas fall within the true spirit of the disclosure.

What is claimed is:
 1. An apparatus comprising: a memory; and aprocessor configured to cause a first wireless device to: transmit aframe comprising mapping information to map a plurality of Modulationand Coding Schemes (MCS) to a respective plurality of preamble lengths;generate a wakeup packet comprising a preamble having a preamble lengthof said plurality of preamble lengths corresponding to an MCS of anon-wakeup transmission from said first wireless device the preamble ofsaid wakeup packet modulated according to an Orthogonal FrequencyDivision Multiplexing (OFDM) scheme, and a payload of the wakeup packetmodulated according to an On-Off keying (OOK) modulation scheme; andtransmit the wakeup packet to a second wireless device.
 2. The apparatusof claim 1, wherein said non-wakeup transmission comprises a beaconframe transmission.
 3. The apparatus of claim 1, wherein said non-wakeuptransmission comprises a data transmission to said second wirelessdevice.
 4. The apparatus of claim 1 configured to cause the firstwireless device to, when said wakeup packet comprises beaconinformation, generate said wakeup packet comprising said preamble, saidpreamble having a length corresponding to an MCS of a beacon frametransmission from said first wireless device.
 5. The apparatus of claim1 configured to cause the first wireless device to, when said wakeuppacket comprises a wakeup indication to wakeup a radio of said secondwireless device, generate said wakeup packet comprising said preamble,said preamble having a length corresponding to an MCS of a datatransmission to said second wireless device.
 6. The apparatus of claim 5configured to cause the first wireless device to determine the MCS ofsaid data transmission based on MCS information received from saidsecond wireless device.
 7. The apparatus of claim 1, wherein said framecomprising said mapping information comprises a beacon frame or a proberesponse frame.
 8. The apparatus of claim 1 comprising an Access Point(AP).
 9. The apparatus of claim 1 comprising a radio to transmit saidwakeup packet.
 10. The apparatus of claim 1 comprising one or moreantennas.
 11. A product comprising one or more tangiblecomputer-readable non-transitory storage media comprisingcomputer-executable instructions operable to, when executed by at leastone processor, enable the at least one processor to cause a firstwireless device to: transmit a frame comprising mapping information tomap a plurality of Modulation and Coding Schemes (MCS) to a respectiveplurality of preamble lengths; generate a wakeup packet comprising apreamble having a preamble length of said plurality of preamble lengthscorresponding to an MCS of a non-wakeup transmission from said firstwireless device the preamble of said wakeup packet modulated accordingto an Orthogonal Frequency Division Multiplexing (OFDM) scheme, and apayload of the wakeup packet modulated according to an On-Off keying(OOK) modulation scheme; and transmit the wakeup packet to a secondwireless device.
 12. The product of claim 11, wherein the instructions,when executed, cause the first wireless device to, when said wakeuppacket comprises beacon information, generate said wakeup packetcomprising said preamble having a length corresponding to an MCS of abeacon frame transmission from said first wireless device.
 13. Theproduct of claim 11, wherein the instructions, when executed, cause thefirst wireless device to, when said wakeup packet comprises a wakeupindication to wakeup a radio of said second wireless device, generatesaid wakeup packet comprising said preamble having a lengthcorresponding to an MCS of a data transmission to said second wirelessdevice.
 14. An apparatus comprising: a memory; and a processorconfigured to cause a first wireless device to: process a frame receivedfrom a second wireless device, the frame comprising mapping informationto map a plurality of Modulation and Coding Schemes (MCS) to arespective plurality of preamble lengths; switch a radio of the firstwireless device to a power save mode; and process a wakeup packetreceived from said second wireless device, the wakeup packet comprisinga preamble having a preamble length of said plurality of preamblelengths corresponding to an MCS of a non-wakeup transmission from saidsecond wireless device the processor configured to cause the firstwireless device to demodulate the preamble of said wakeup packetaccording to an Orthogonal Frequency Division Multiplexing (OFDM)scheme, and to demodulate a payload of the wakeup packet according to anOn-Off keying (OOK) modulation scheme.
 15. The apparatus of claim 14,wherein said non-wakeup transmission comprises a beacon frametransmission from said second wireless device.
 16. The apparatus ofclaim 14, wherein said non-wakeup transmission comprises a datatransmission from said second wireless device.
 17. The apparatus ofclaim 16 configured to cause the first wireless device to wakeup saidradio to receive said data transmission.
 18. The apparatus of claim 16configured to cause the first wireless device to transmit to said secondwireless device MCS information to indicate the MCS to be applied tosaid data transmission.
 19. The apparatus of claim 14, wherein saidpreamble has a length corresponding to an MCS of a beacon frametransmission from said second wireless device, when said wakeup packetcomprises beacon information.
 20. The apparatus of claim 14, whereinsaid preamble has a length corresponding to an MCS of a datatransmission from said second wireless device, when said wakeup packetcomprises an indication to wakeup said radio.
 21. The apparatus of claim14 comprising one or more antennas and a memory.
 22. The apparatus ofclaim 14 comprising said radio, and a wakeup receiver to receive saidwakeup packet.
 23. A product comprising one or more tangiblecomputer-readable non-transitory storage media comprisingcomputer-executable instructions operable to, when executed by at leastone processor, enable the at least one processor to cause a firstwireless device to: process a frame received from a second wirelessdevice, the frame comprising mapping information to map a plurality ofModulation and Coding Schemes (MCS) to a respective plurality ofpreamble lengths; switch a radio of the first wireless device to a powersave mode; and process a wakeup packet received from said secondwireless device, the wakeup packet comprising a preamble having apreamble length of said plurality of preamble lengths corresponding toan MCS of a non-wakeup transmission from said second wireless device,the instructions, when executed, cause the first wireless device todemodulate the preamble of said wakeup packet according to an OrthogonalFrequency Division Multiplexing (OFDM) scheme, and to demodulate apayload of the wakeup packet according to an On-Off keying (OOK)modulation scheme.
 24. The product of claim 23, wherein said preamblehas a length corresponding to an MCS of a data transmission from saidsecond wireless device, when said wakeup packet comprises an indicationto wakeup said radio.